Two amazing quotes by Calvin on the relationship of justification and sanctification.
by John Calvin
:Justification and sanctification, gifts of grace, go together as if tied by an inseparable bond, so that if anyone tries to separate them, he is, in a sense, tearing Christ to pieces. Sanctification doesn’t just flow from justification, so that one produces the other. Both come from the same Source. Christ justifies no one whom He does not also sanctify. By virtue of our union with Christ, He bestows both gifts, the one never without the other."
Calvin’s Commentary on 1 Corinthians 1:30, Volume XX, Baker, 1993, p. 93.
"Why, then, are we justified by faith? Because by faith we grasp Christ’s righteousness, by which alone we are reconciled to God. Yet you could not grasp this without at the same time grasping sanctification also. For he ‘is given unto us for righteousness, wisdom, sanctification, and redemption’ (1 Cor 1:30). Therefore Christ justifies no one whom he does not at the same time sanctify. These benefits are joined together by an everlasting and indissoluble bond, so that those whom he illumines by his wisdom, he redeems; those whom he redeems, he justifies; those whom he justifies, he sanctifies. But, since the question concerns only righteousness and sanctification, let us dwell upon these. Although we may distinguish them, Christ contains both of them inseparably in himself. Do you wish, then, to attain righteousness in Christ? You must first possess Christ; but you cannot possess him without being made partaker of his sanctification, because he cannot be divided into pieces (1 Cor. 1:13). Since, therefore, it is solely by expending himself that the Lord gives us these benefits to enjoy, he bestows both of them at the same time, the one never without the other. Thus it is clear how true it is that we are justified not without works yet not through works, since in our sharing in Christ, which justifies us, sanctification is just as much included as righteousness." (John Calvin, Institutes of the Christian Religion. Found in The Library of Christian Classics (Philadelphia: Westminster, 1960), Volume XIX, Book III, Ch. XVI.1, p. 798).